Two field experiments were carried out at Baramoon Experimental Station, Dakahlia Governorate, Egypt, during the two successive seasons of 2003-2004 and 2004-2005 to study the effect of No Effective Microorganisms (EMI), askobein, microbein, biogein and ammonium sulphate at the rate of 150 kg/Fed. The results were as follow: Biogein Mowed by microbein, ascobein and ammonium sulphate, respectively, compared with untreated plants enhanced all measurements such as plant height, number of branches, number of umbels, weight of fruits (per plant and per plot), volatile oil.percentage, volatile oil yield (per plant and per plot), the main component of fennel volatile oil (anethole) was increased in the two seasons in comparison with control plants. The combinations of EMI with each of biogein, microbein, ascobein and ammonium sulphate were more effective on all traits studied than each individual treatment in both seasons. (EMI) application individually achieved results better than obtained by biogein, microbein, ascobein and ammonium sulphate individually, on the other hand, combination of EMI with each of biogein, microbein, ascobein or ammonium sulphate, respectively, were the best applications in both two seasons.